Rika Rk200-03 High Quality Solar Illuminance Sensor for Environmental Monitoring. WMO Standard Compliance: Conforms to World Meteorological Organization standards for accurate solar radiation measurement. Dual Glass Protection: Features double transmission glass for high sensitivity and protection in harsh environments. Multiple Output Options: Supports 0-20mV, 4-20mA, 0-5V, and RS485 MODBUS-RTU signal outputs. IP65 Weatherproof Rating: Dust-tight and protected against water jets, suitable for outdoor environmental monitoring. Temperature Compensation: Built-in circuit reduces ambient temperature effects on product properties. Visual Desiccant Window: Allows easy monitoring of internal moisture levels to ensure sensor longevity. Wide Application Scope: Ideal for solar energy, agriculture, forestry, tourism, and weather station monitoring. CE Certified Quality: Product meets European safety and quality standards with ISO certifications.